NASA is considering launching missions to Mars as early as next year in an effort to expedite its plan to land astronauts on the Red Planet. The surprise shift of focus comes less than a week after the U.S. administration released its proposed budget for the agency, which emphasizes the national goal of landing a human on Mars.

It's been more than six decades since Alan Shepard launched on his famous suborbital flight. What would think of the U.S. space program today?